Practice Electric Drives Basic Multiple Choice Questions with Answers Quiz-1

Q.1.

The length of phasor is ___________

a) R.M.S
b) Average
c) Peak to Peak
d) Minimum

Explanation

Q.2.

Instantaneous power in the 3-φ system is constant.

a) True
b) False

Explanation

Q.3.

What is the condition for maximum power transfer theorem in DC circuits?

a) RL=2Rth
b) RL≠Rth
c) RL≫Rth
d) RL=Rth

Explanation

Q.4.

Transient analysis is only applicable to bounded systems.

a) True
b) False

Explanation

Q.5.

Calculate the velocity of the ball if the angular speed is 7 rad/s and radius is .2 m.

a) 2.5 m/s
b) 1.4 m/s
c) 4.5 m/s
d) 1.0 m/s

Explanation

Q.6.

Calculate the value of the time period if the frequency of the signal is .Hz.

a) 1000 sec
b) 2000 sec
c) 5000 sec
d) 1500 sec

Explanation

Q.7.

Calculate the value of the frequency of theV DC supply.

a) 100 Hz
b) 0 Hz
c) 200 Hz
d) 500 Hz

Explanation

Q.8.

Calculate the value of power factor if the values of R and Z are 2 Ω andΩ.

a) 0.8
b) 0.5
c) 0.2
d) 0.4

Explanation

Q.9.

Calculate the value of capacitor voltage during resonance condition if the value of supply voltage isV and the quality factor is 3.

a) 60 V
b) 50 V
c) 10 V
d) 30 V

Explanation

Q.10.

WhenA current flows into the positive terminal of current source 8 V. Calculate the power delivered by the source.

a) -240 W
b) 360 W
c) -430 W
d) 500 W

Explanation

Q.11.

The slope of the V-I curve is 17.587o. Calculate the value of resistance. Assume the relationship between voltage and current is a straight line.

a) .322 Ω
b) .360 Ω
c) .316 Ω
d) .778 Ω

Explanation

Q.12.

Calculate the equivalent inductance when two inductors are connected in parallel of valuesH andH.

a) 6 H
b) 10 H
c) 12 H
d) 8 H

Explanation

Q.13.

Calculate the active power in an 0 Ω resistor with 0 current flowing through it.

a) inf MW
b) 0 MW
c) 2 MW
d) 18 MW

Explanation

Q.14.

When 1 A current flows out of the positive terminal of voltage source 6 V. Calculate the power delivered by the source.

a) 6 W
b) 7 W
c) -9 W
d) -5 W

Explanation

Q.15.

Calculate the value of inductor voltage during resonance condition if the value of supply voltage is 7 V and the quality factor is 9.

a) 59 V
b) 63 V
c) 73 V
d) 33 V

Explanation

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